PCI1710 Advantech Data Acquisition Card Sampling Rate Stuck at 1kHz Instead of 720Hz

Hello there,I am currently working on a Data Acquisition Card (it's  PCI1710 from Advantech) and trying to use Streaming Buffer Analog Input  with a signal of 60 Hz to measure values at a sampling rate of 720 Hz.  I am using a C++ program to store measured values into a file. While printing, the graph shows the samples  at nearly 1 kHz, but not 720 Hz. I am expecting 12 samples (=720/60) per cycle but the result is about 17 samples (=1000/60) per cycle.I even tried to change the sampling rate from 720 Hz to 1500 Hz and 50 kHz too, but the result in every case shows 17 samples per cycle.  I have configured the device to a "convert clock rate" of 720 Hz (which I believe is the sampling rate) from the "Navigator Software" available from the company,  but I have not written down the configuration code in my program. Does anyone have an idea how I can get the 'sampling rate' running? The device can handle sampling rate upto 100 kHz. Thank you.Regards,

Niraj, this is way outside my expertise, however I have asked Advantech Tech Support if they can reply.  Did you contact them directly?  They would have experts best placed to answer thorny technical questions about their own products.

David, thank you for the reply. Please let me know when Advantech replies to you. I will also try to contact them from my side. 

Niraj, I got a reply from Advantech, but they would like more information:
I’m sorry for the reply, and I’m not exact to know the questions.It seems customer use C++ with our library. However, there are some information still need customer clarify.1.      What driver and SDK version?2.      What OS is?3.      Does customer refer to our sample code? Suggest customer to refer to our latest driver and SDK, following are for windows:http://support.advantech.com/support/DownloadSRDetail_New.aspx?SR_ID=1-FBZT5Y&Doc_Source=Download1.      Install SDK: DAQNavi_SDK_4.0.3.5.zip2.      Install Driver: DAQNavi_PCI1710_3.2.11.0.zip3.      Refer to our sample code: C:AdvantechDAQNaviExamplesC++_ConsoleAI_Instant sample for capture by interval (speed < 1kHz), it don’t need to do the sampling setting on Navigator.AI_AsynchronousOneBufferedAI, AI_SynchronousOneBufferedAI, and AI_StreamingAI for fast AI (speed >1KHz)
There was a screenshot as well which I cannot post here.If you contact me at stn564 (AT) yahoo (dot) com (dot) au  I will forward you a copy of the complete reply.You can then contact the Advantech support guy directly for further assistance.Cheers / David

David,Thank you very much for your efforts. Much appreciated! I managed to contact one of the personnel from Advantech and just fixed the issue. Kind Regards.

Niraj, always a pleasure.  With very product-specific queries like this it is always a good idea to contact the supplier directly.  It does not always work, which is where forums like this can help, there is often someone who has had the same problem and knows what to do.Cheers // David